1What do all those files mean? 2============================= 3 4 * `php.y`: PHP 5-8 grammar written in a pseudo language 5 * `parser.template`: A `kmyacc` parser prototype file for PHP 6 * `rebuildParsers.php`: Preprocesses the grammar and builds the parser using `kmyacc` 7 8.phpy pseudo language 9===================== 10 11The `.y` file is a normal grammar in `kmyacc` (`yacc`) style, with some transformations 12applied to it: 13 14 * Nodes are created using the syntax `Name[..., ...]`. This is transformed into 15 `new Name(..., ..., attributes())` 16 * Some function-like constructs are resolved (see `rebuildParsers.php` for a list) 17 18Building the parser 19=================== 20 21Run `php grammar/rebuildParsers.php` to rebuild the parsers. Additional options: 22 23 * The `KMYACC` environment variable can be used to specify an alternative `kmyacc` binary. 24 By default the `phpyacc` dev dependency will be used. To use the original `kmyacc`, you 25 need to compile [moriyoshi's fork](https://github.com/moriyoshi/kmyacc-forked). 26 * The `--debug` option enables emission of debug symbols and creates the `y.output` file. 27 * The `--keep-tmp-grammar` option preserves the preprocessed grammar file. 28
